"A population has been exhibiting genetic equilibrium". Answer the following with regard to the above statement.
(i) Explain the above statement.
(ii) Name the underlying principle.
(iii) List any two factors which would upset the genetic equilibrium of the population.
(iv) Take up any one such factor and explain how the gene pool will change due to that factor

Explanation

(i)Allele frequencies in the gene pool of a population remains unchanged for generations:
(ii) Hardy-Weinberg equilibrium
(iii) Any two factors - Mutation/Natural selection / gene flow/genetic drift/ migration.
(iv) Mutation changes alleles/Natural selection: brings about greater reproduction of certain alleles